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Submitted on: 05 April 2010.
Revised on: 29 June 2010.
Accepted on: 17 July 2010.
___________________Applied Economic Analysis---EMERALD GROUP PUBLISHING LTD
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Submitted on: 25 March 2021.
Revised on: 01 May 2021.
Accepted on: 18 May 2021.
___________________Applied Economic Analysis---EMERALD GROUP PUBLISHING LTD